A 24-Year-Old Woman Comes to the Office Due to Copious

A 24-year-old woman comes to the office due to copious green vaginal discharge and burning with urination for 3 days.  The patient had a yeast infection a year ago, which was treated with over-the-counter medication.  She has recently become sexually active with a new partner and occasionally uses condoms.  Physical examination shows a yellow-green, frothy vaginal discharge and diffuse vaginal erythema but no lesions.  The uterus is anteverted with no cervical motion tenderness.  Which of the following is the best test to confirm the diagnosis in this patient?

A) Cervical cytology
B) Gram stain
C) Potassium hydroxide testing
D) Urine culture
E) Vaginal pH
F) Wet mount saline microscopy

Correct Answer:

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